131781944719 has 2 divisors, whose sum is σ = 131781944720. Its totient is φ = 131781944718.

The previous prime is 131781944677. The next prime is 131781944737. The reversal of 131781944719 is 917449187131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131781944719 - 2¹¹ = 131781942671 is a prime.

It is a super-2 number, since 2×131781944719² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131781944719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131781944419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65890972359 + 65890972360.

It is an arithmetic number, because the mean of its divisors is an integer number (65890972360).

Almost surely, 2^131781944719 is an apocalyptic number.

131781944719 is a deficient number, since it is larger than the sum of its proper divisors (1).

131781944719 is an equidigital number, since it uses as much as digits as its factorization.

131781944719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 55.

The spelling of 131781944719 in words is "one hundred thirty-one billion, seven hundred eighty-one million, nine hundred forty-four thousand, seven hundred nineteen".